title: Growth-controlling factors produced during the logarithmic and stationary phases of Tetrahymena pyriformis.
abstract: Tetrahymena pyriformis grown to logarithmic phase and then inoculated into either fresh or conditioned medium exhibited a shorter lag phase than ciliates taken from stationary cultures. The growth inhibiting substance(s), which is probably produced by the growing ciliates, is thermostable and can be adsorbed to activated charcoal.
mesh_terms: D000818:Animals; D002455:Cell Division; D003470:Culture Media; D006131:Growth Inhibitors / Q000502:physiology; D006133:Growth Substances / Q000502:physiology; D013769:Tetrahymena pyriformis / Q000166:cytology* / Q000254:growth & development; D013997:Time Factors
chemical_list: D003470:Culture Media; D006131:Growth Inhibitors; D006133:Growth Substances